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package images
import (
"bytes"
"io"
"path/filepath"
"strings"
)
/*
* Preprocess image files on client side.
* 1. possibly adjust the orientation
* 2. resize the image to a width or height limit
* 3. remove the exif data
* Call this function on any file uploaded to SeaweedFS
*
*/
func MaybePreprocessImage(filename string, data []byte, width, height int) (resized io.ReadSeeker, w int, h int) {
ext := filepath.Ext(filename)
ext = strings.ToLower(ext)
switch ext {
case ".png", ".gif":
return Resized(ext, bytes.NewReader(data), width, height, "")
case ".jpg", ".jpeg":
data = FixJpgOrientation(data)
return Resized(ext, bytes.NewReader(data), width, height, "")
}
return bytes.NewReader(data), 0, 0
}
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